Can single ended 211 or 212 amplifiers drive magnepan 20.7?

@thegreenman 

yes sir! Let me describe the 845/LRS synergy. The tone and PRAT are there. Timbre is correct. BUT it seems kind of "Thin". The body of male singers like Belafonte and Johnny Matis seems thinner to me. Switching the Xa-25, then their voices have more body. Also, with the 845/LRS, the Strings and Bass guitars seems different in terms of the body of the string. While when using the Xa-25, then it changes to a fuller body. 

don't get me wrong, the 845 is on par with the xa-25 BUT only when they are driving the Falcon LS3/5a.

I have used Maggies for more than twenty years and for most of that time was very happy using a hi quality 100 watt/ch class A/B amp. Now I drive them with a Rogue Farrah and it does fairly well, but I am not completely happy with the sound, and I am not completely happy with my hearing, so not sure what the problem is.   However, I am sure of the beauty of Maggy sound and the need for clean power. Stop trying to use low power tubes to power them and switch to any number of reasonably powered solid state ( including modern Class D ) amps and you will rewarded.  I might add that a couple of years ago I added a 12 inch SVS 2000 Pro sub to the system and it filled up the bottom end quiet a bit. Don't let anyone poo poo you on the new SVS subs, they are pretty good.

Good luck on your search.

@joeycastillo hahaha thanks for sharing! for me always tubes for easy to drive stuff :p even if i have to lose abit of bass :p for me i really dig the sweet highs and beautiful mids

@assetmgrsc hahaha thanks for sharing! guess between soundstage scale and beautiful sweet highs/mids w tube magic i need to give up one of them! 😢

interesting though that a 18w 845 amplifier cant drive it but a 25 watt pass labs can! both are class A

@thegreenman The output impedance of the Pass Labs amp is much lower so 4 Ohms does not bother it. SETs on the other hand have a high output impedance and driving 4 Ohms make less power and likely roll off the bass a bit due to inefficiencies in the output transformer. 

If you really want to hear most SETs strut their stuff you'll need a speaker that is over 100dB 1 Watt/1 meter. 

guess between soundstage scale and beautiful sweet highs/mids w tube magic i need to give up one of them!

There are class D amps available now that make this statement false. I've been playing tube amps for over 50 years- I get the allure. Its hard to imagine that solid state could bring that, but its also hard to imagine that in over 50 years that technology hasn't improved. It has, right along with gas mileage and reliability in cars, cell phones and so on. IOW it had to happen sooner or later.